13 Reasons Why season 2 release date: When is it on Netflix?

Showrunner Brian Yorkey – who was behind season one – will be back at the helm, with 13 more hour-long episodes of the show in the works.

The official 13 Reasons Why Twitter account posted a short teaser trailer confirming season two, showing various memorable locations from the first season such as Liberty High School, The Crestmont, and Monet's.

Brandon Flynn (Justin Foley) said he was excited for season two, posting on Instagram: "Can't wait to get back to work with this beautiful team!"

Alisha Boe (Jessica Davis) and Justin Prentice (Bryce Walker) also seem certain to come back, with Yorkey stating his interest in continuing their stories (more on that later), while Miles Heizer (Alex Standall) suggested his cliffhanger will be addressed – meaning he will return in some form.

Michele Selene Ang (Courtney Crimsen) said on Instagram: "See all you freaks back at Liberty High."

The show held an open casting call in June, looking for "students, baseball players, track and field athletes, cheerleaders, boxers, parents, teachers, and coffee shop patrons". Actors of "all ages, types, and ethnicities" were encouraged to attend.

In August, a few new characters were announced:

Kelli O'Hara, a Tony award-winning Broadway actress and star of Masters of Sex, will join the cast as Jackie, an "advocate for victims of bullying" (via TVLine).

Other cast additions include Bryce Cass, who will play Cyrus, described as "an edgy, cynical mischief maker" and his on-screen sister Mackenzie, played by Chelsea Alden (who you might recognise from American Horror Story), who is "artsy, witty" and outspoken.

Also joining students at Liberty High School for season two will be Samantha Logan (The Fosters) as track star Nina and Anne Winters (Tyrant) playing head cheerleader Chloe.

13 Reasons Why season 2 spoilers: What will happen?

Firstly, the tapes are being scrapped. Those cassettes still exist, of course, but rather the episodes will no longer be structured around Hannah's narration.

Instead, there will be a "different sort of analogue technology that plays a hugely important role in season two", showrunner Yorkey teased.

"The cassette tapes aren't at the centre of it – those two boxes of tapes are still hanging around and matter to people, but there will be a new piece of technology for 13-year-olds to Google and try to understand what it was."

Season two will keep the multiple-timeline storytelling, but Hannah is no longer the narrator. Instead, somebody else will be providing the voiceover.

We will see "other perspectives on Hannah's story", too. This is particularly interesting, because there were a couple of moments in the first season where certain characters questioned Hannah's "truth".

Of note, remember the letter that Hannah gave to Zach? The one which she claimed he had thrown away, thus rejecting her plea for help?

"I want to do Jessica's story the deserved justice of following her as she goes back to school, as she tries to begin to recover from what happened to her, because it's something that millions of young women go through," Yorkey said.

Other cliffhangers from the season one finale include what happens with school counsellor Kevin Porter (will he be fired?), Alex's suicide attempt, Zach desperately trying to reach Alex only to receive a call from somebody else, and Tyler's stash of guns.

Any fears that 13 Reasons Why would have to censor itself in light of the controversy the show drew for season one (over its depiction of suicide) can rest easy: Dylan Minnette and executive producer Tom McCarthy have both said season two will not be censored.

"I'm sure it's going to be just as important and dark as last season," Minnette said.

13 Reasons Why season 2 theories: Did Tyler shoot Alex?

With the way the season one finale ended, it's not surprising that people have been coming up with fan theories about season two – many of which are truly clever and imaginative.

Perhaps the most popular one out there is tied to Alex's cliffhanger. In the finale, Alex was fighting for his life after it was revealed that he shot himself.

We never saw this happen on screen, and fans have suggested that Tyler actually shot him instead. The theory points out that Tyler had a stash of guns hidden in his room, and that he ominously took down Alex's photo that he had previously hung up in his studio.

"That's another subject that's very rarely shown on screen and is probably a lot more common than people think it is: people attempting to take their lives and it not happening. I'm sure that will bring a crazy set of issues. It would be interesting to go into that," he said.

That's not all. Alex was seen in an ambulance – but if you ask some fans, they think that scene is actually a flashforward and it's not Alex there at all. Maybe it's Bryce. Maybe it's Justin.

As for Tyler's stash of guns, one common theory is that he is planning a school shooting.

Tyler had photos of numerous other students (including Clay) in his studio – people who have wronged and bullied him. Maybe these students are the targets, and maybe he actually took down Alex's picture because he had decided to spare him (the opposite of the 'Tyler shoots Alex' theory).

Lastly, a lot of fans seem to think that Tony is either a ghost or a figment of Clay's imagination.

This one is a little more difficult to swallow, mainly because we have seen Tony interacting with plenty of other characters besides Clay, but it's interesting nonetheless...